Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 875

Determining the Affect of a Port on the Power Budget The PoE and PoE+ power budget is affected differently depending on how you enable PoE and PoE+ and whether a device is connected. The following lists these differences. 1 When you configure a port as power inline without setting the max_milliwatts power limit option, the Dell Networking OS does not allocate any power to the port unless a device is connected and there is no limit to the amount of power consumed by the powered device. 2 When you configure a port aspower inline with the max_milliwatts power limit option, the Dell Networking OS does not allocate any power to the port unless a device is connected but restricts the maximum power that can be consumed by the powered device to the amount set through the max_milliwatts option. 3 The max_milliwatts option has no effect on a port extender (PE) port when the PE port is configured to be in Class mode. Managing Power Priorities PoE or PoE+ enabled port extender ports have power access priorities based first on the priority configured and then on their port number. The default priority is with respect to the port numbers, the lower port numbers have higher priorities when compared with higher port numbers You can augment the default prioritization using the [no] power inline {[max_milliwatts] | priority {critical | high | low}} command, where critical is the highest priority and low is the lowest priority. NOTE: If you configure a priority with this command, the Dell Networking OS ignores any LLDP-MED priority on this port. If you do not configure a port priority with this command, the Dell Networking OS honors any LLDP-MED priority. In general, priority is assigned in this order: 1 power inline priority {critical | high | low} setting or priority advertised by LLDP TLV.power inline mode pe pe-id stack-unit unit-number {class | static} setting: NOTE: The power inline static setting has a higher priority for access to power than those configured using the class setting. 2 port number . NOTE: By default, all ports are set to low priority. Power over Ethernet (PoE) 875